Mini RS-232 to RS-485/422 Interface Serial Converter

For communication between PC with different standard serial port and external equipments or intelligent instruments, standard serial conversion is necessary. This converter is compatible with RS-232C, RS-485 standards. It converts RS-232 signals into balanced differential RS-485 signals. The transmission distance of RS-232 communication can be extended to 1.2km. It adopts unique "RS-232" charge pump technology to drive the system, and gains power without initializing RS-232 serial port. This converter is with built-in zero delay auto receiving and transmitting conversion and unique I/O circuit auto control data flow direction without any handshake signal (RTS, DTR); this guarantees that there is no need to modify the programming under RS-232 full duplex or half duplex mode, it will run smoothly under current software and hardware. The transmission rate is 300-115.2kbps. It can be used between hosts, host and SCM, which building a point to point, point to multipoint long-distance communication networking. It is widely applied in industrial automation control system, all-in-one card, access control system, parking system, ATM system, bus charging system, canteen ticketing system, attendance system, and toll station system, etc 
1. Standards:RS-232, RS-485 TIA/EIA
2. RS-232 DB9 female connector, RS-485 DB9 male connector, with terminal block
3 Operating mode:asynchronous half-duplex, differential transmission
4 Transmission media:twisted-pair or shielded cable
5. Baudrate:300bps-115.2kbps
6. Dimension:63mm×33mm×17mm
7. Operating temperature: -25ºC to 70ºC
8. Relative humidity:5% to 95%
9. Transmission distance:1,200m (RS-485); 5m (RS-232)
10.. Protection:RS-485 each line 600W surge, lightning protection